Chen Meng,Yuan Congjun,Shu Deyuan,et al.The Relationship Between Soil Organic Carbon and Physicochemical Properties in Different Forest Types[J].Research of Soil and Water Conservation,2024,31(05):26-34.[doi:10.13869/j.cnki.rswc.2024.05.017]
黔东南丘陵山地5种林分类型土壤有机碳与理化性质间的关系
- Title:
- The Relationship Between Soil Organic Carbon and Physicochemical Properties in Different Forest Types
- 文章编号:
- 1005-3409(2024)05-0026-09
- Keywords:
- forest type; soil organic carbon; ecological stoichiometric characteristics; soil bulk density; correlation
- 分类号:
- S154.2
- 文献标志码:
- A
- 摘要:
- [目的]探明贵州省黔东南地区不同林分类型土壤有机碳含量与土壤理化因子间的关系,以期为营造合理的林分类型和树种结构,有效提升森林碳汇潜力提供科学参考。[方法]以天柱国营林场马尾松林、杉木林、针叶混交林、阔叶混交林及针阔混交林为研究对象,在5种林分类型中分别设置3个25.82 m×25.82 m样地,采集各样地0—20 cm,20—40 cm,40—60 cm层土样,测定土壤有机总碳、pH、含水量、容重、石砾含量、氮、磷、钾等理化指标及相关性,并分析不同林分类型土壤有机碳及土壤理化性质间的相关性。[结果](1)马尾松林土壤总有机碳含量22.25～42.08 g/kg,杉木林土壤总有机碳含量30.12～50.33 g/kg,针叶混交林土壤总有机碳含量22.93～48.17 g/kg,阔叶混交林土壤总有机碳含量24.01～67.68 g/kg,针阔混交林土壤总有机碳含量32.99～92.36 g/kg。针阔混交林土壤有机碳含量最高,且各林分类型均出现表层富集特征。(2)马尾松林土壤有机碳含量与水解氮极显著正相关; 杉木林与全氮、水解氮显著负相关; 针叶混交林与土壤pH显著负相关,与土壤含水量、全氮及全钾显著正相关; 阔叶混交林与土壤pH极显著正相关; 针阔混交林与土壤含水量、全氮、全磷、全钾含量极显著正相关。(3)各相关因子中,水解氮是马尾松林土壤有机碳含量的主导因子,全氮是杉木林与针叶混交林的主导因子,土壤pH是阔叶混交林的主导因子,土壤含水量是针阔混交林的主导因子。[结论]不同林分类型土壤环境的差异对土壤有机碳积累的影响有所不同。受枯落物、根系、养分迁移等影响,针阔混交林土壤有机碳含量较其他4种林分类型高。
- Abstract:
- [Objective]The aim of this study is to explore the relationship between soil organic carbon content and soil physicochemical factors of different forest types in southeastern Guizhou Province, China. [Methods]The pure Pinus massoniana forest, pure Cunninghamia lanceolata forest, coniferous mixed forest, broad-leaved mixed forest, and coniferous broad-leaved mixed forest were selected in Tianzhu State owned Forest Farm. The standard plot survey method was used to set up sample plots for five types of forests. Five point sampling method was used to collect soil samples from 0—20 cm, 20—40 cm, and 40—60 cm layers of each forest, and soil organic total carbon, soil pH, soil moisture content, soil bulk density, and soil gravel content were measured for each forest type, nitrogen, phosphorus, potassium and other physical and chemical indicators. Person correlation analysis between soil organic carbon and soil physical and chemical properties were conducted. [Results](1)The total organic carbon content of soil pure Pinus massoniana fores ranged from 22.25 to 42.08 g/kg, pure Cunninghamia lanceolata forest ranged from 30.12 to 50.33 g/kg, coniferous mixed fores ranged from 22.93 to 48.17 g/kg, broad-leaved mixed forest ranged from 24.01 to 67.68 g/kg, and soil coniferous broad-leaved mixed forest ranged from 32.99 to 92.36 g/kg. Overall, coniferous broad-leaved mixed forest soil had the highest organic carbon content, and all forest types exhibited surface enrichment characteristics.(2)The pure Pinus massoniana forest was positively correlated with soil total nitrogen and hydrolyzed nitrogen, while the pure Chinese fir forest was negatively correlated with soil total nitrogen and hydrolyzed nitrogen. The mixed coniferous forest was negatively correlated with soil pH, soil moisture, total nitrogen, and total potassium content. The broad-leaved forest was positively correlated with soil pH and total potassium content, while the mixed coniferous and broad-leaved forest was positively correlated with soil moisture, total nitrogen, total phosphorus, and total potassium content.(3)The organic carbon content of pure Pinus massoniana fores soil was mainly affected by the content of hydrolyzed nitrogen, pure Cunninghamia lanceolata forest and coniferous mixed fores were mainly affected by the content of total nitrogen, broad-leaved mixed forest was mainly affected by the soil pH, coniferous broad-leaved mixed forest was the main factor of soil moisture, total phosphorus, hydrolyzed nitrogen, and total nitrogen, and the degree of influence is manifested by the order:water content>total phosphorus>hydrolyzed nitrogen>total nitrogen. [Conclusion]The content of soil organic carbon is significantly influenced by forest type and soil physicochemical properties, and constructing a mixed forest with needle and broad-leaved trees is more conducive to the accumulation of soil organic carbon.
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备注/Memo
收稿日期:2023-09-11 修回日期:2023-10-26
资助项目:贵州省科技计划项目(黔科合服企[2020]4010); 贵州省林业局“贵州人工商品纯林树种结构优化调整对森林碳汇效益提升监测研究”; 贵州省科技计划项目(黔科合基础-ZK[2022]一般241)
第一作者:陈梦(1995—),女,贵州省六盘水人,硕士研究生,助理工程师,研究方向:森林生态学、土壤微生物等。E-mail:2314213351@qq.com
通信作者:袁丛军(1990—),男,贵州安顺人,副研究员,主要从事喀斯特生态恢复与治理、森林经营与林下经济产业融合、生物多样性保护、乡土特色植物资源分类与功能化利用研究。E-mail:ycongjun2016gzslky@163.com